When I was two, my family took me to my grandma's farm, where she had all kinds of animals, including chickens. As a curious two-year-old, I ran up to the chicken pen to take a look, and a rooster lunged at me aggressively. Luckily there was wire between us, so no harm done, but it scared me so much that I had nightmares about that rooster for the next ten years.

We had that rooster for dinner that night, so he got what he deserved. :)